Discuss Why Water Repellent for Stone Turns Yellow? in the Specialist Tiles -Stone, Porcelain, Glass area at TilersForums.com

Y

yhchang

TF
Joined
Aug 27, 2019
Messages
10
Location
Taiwan
What member type are you?
Sales Rep that could sell to Tilers
Hello everyone,

I am wondering why some surface water repellents for stone easily turns yellow over time? Is it because of their components reacting with atmosphere or rain?

(I am not sure if it is proper to ask this question here . If not, I will delete it.)

Best regards,
Sam

1B3BD884-3542-4871-B3FF-19838E6C00E8.jpeg
 
L

Lithofin BOB

TF
Esteemed
Supporter
Joined
Nov 13, 2008
Messages
604
Reactions
615 1
Location
Hampshire
Hi - impregnators or sealers can yellow or discolour for a few reasons , some will change the colour of stone or tiles without issue , they simply should be tested prior to completing a complete area.

Incorrect products being used in the wrong situation . i.e.. Some internal sealers used externally can be problematic

Over application of an impregnator or sealer where the discolouration can occur in the over applied polymer or ingredient of the product.

it can also be moisture related, if moisture is trapped behind the seal at installation or if a failure occurs and water penetrates through the back , this can cause water marking /discoloration, rather than you thinking the impregnator or seal is discolouring.

there are some products still out there that are affected by UV and can yellow.
 
Y

yhchang

TF
Joined
Aug 27, 2019
Messages
10
Location
Taiwan
What member type are you?
Sales Rep that could sell to Tilers
  • Thread Starter Thread Starter
  • #3
Hi - impregnators or sealers can yellow or discolour for a few reasons , some will change the colour of stone or tiles without issue , they simply should be tested prior to completing a complete area.

Incorrect products being used in the wrong situation . i.e.. Some internal sealers used externally can be problematic

Over application of an impregnator or sealer where the discolouration can occur in the over applied polymer or ingredient of the product.

it can also be moisture related, if moisture is trapped behind the seal at installation or if a failure occurs and water penetrates through the back , this can cause water marking /discoloration, rather than you thinking the impregnator or seal is discolouring.

there are some products still out there that are affected by UV and can yellow.
I see. In above photo, this water repellent has been applied over around 20 years. Probably the owner of this house use wrong product. As far as I know, penetrant sealers (siloxane) is less likely to have this problem (turning yellow. Anyway, thank you for your answer.
 

Reply to Why Water Repellent for Stone Turns Yellow? in the Specialist Tiles -Stone, Porcelain, Glass area at TilersForums.com

New Threads (Sitewide)

Top Bottom

Use TilersForums.com to find Tiling Jobs or your Local Tilers for free. Get tiling tools at the best prices via the forum.